EP2412209B1 - Leuchtquelle mit empfänger für abstandbedienung und speiseanordnung - Google Patents

Leuchtquelle mit empfänger für abstandbedienung und speiseanordnung Download PDF

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Publication number
EP2412209B1
EP2412209B1 EP10712534.6A EP10712534A EP2412209B1 EP 2412209 B1 EP2412209 B1 EP 2412209B1 EP 10712534 A EP10712534 A EP 10712534A EP 2412209 B1 EP2412209 B1 EP 2412209B1
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EP
European Patent Office
Prior art keywords
light emitting
emitting device
device system
remote control
control signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10712534.6A
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English (en)
French (fr)
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EP2412209A1 (de
Inventor
Harald J. G. Radermacher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Signify Holding BV
Original Assignee
Philips Lighting Holding BV
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Publication date
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Priority to EP10712534.6A priority Critical patent/EP2412209B1/de
Publication of EP2412209A1 publication Critical patent/EP2412209A1/de
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/19—Controlling the light source by remote control via wireless transmission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/053—Component parts or details
    • F02G1/057—Regenerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/048—Refractors for light sources of lens shape the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
    • F28D17/02—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles using rigid bodies, e.g. of porous material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/19—Controlling the light source by remote control via wireless transmission
    • H05B47/195—Controlling the light source by remote control via wireless transmission the transmission using visible or infrared light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49231—I.C. [internal combustion] engine making

Definitions

  • the invention relates to a light emitting device system comprising power supply terminals and a remote control signal receiver, the power supply terminals being adapted for receiving electrical power from a driver, the remote control signal receiver being adapted for receiving a remote control signal.
  • the invention further relates to a driver for an external light emitting device system comprising power supply terminals and a detector circuit, the power supply terminals being adapted for supplying electrical power from the driver to the light emitting device system and the detector circuit being adapted for capturing remote control signal information of the light emitting device system, wherein the driver is further adapted to control the supplied power, depending on the determined remote control signal.
  • the invention further relates to a system comprising an external control system and two drivers.
  • Solid state light (SSL) sources such as but not limited to light emitting diodes (LEDs) will play an increasingly significant role in general lighting in the future. This will result in more and more new installations being equipped with LED light sources in various ways.
  • the reason for replacing state of the art light sources with LED light sources is e.g. the low power consumption of LED light sources and their extremely long lifetime.
  • an LED is driven by means of a special circuit, which is called the driver.
  • the driver To control the LED light source for example with respect to color or light intensity a user may have a remote control to select certain light emission characteristics. It is also possible that the remote control signals are generated by a technical system which controls the lamps in a certain location (e.g. a room).
  • US 2008/0284356 A1 discloses a remote-dimmable energy saving device which comprises a remote control transmitter and a dimmable electronic ballast with a built-in remote control receiver.
  • US2007/091597 provides a light emitting device system comprising power supply terminals and a remote control signal receiver.
  • the power supply terminals are adapted for receiving electrical power from a driver.
  • the remote control signal receiver is adapted for receiving a remote control signal.
  • US2007/091597 discloses a LED lamp with a built in driver and a (IR) remote control receiver. A similar lamp is described in WO2007/089581 .
  • the invention intends to provide a remotely controllable light emitting device system that may be applied without the need to have the driver integrated in the system.
  • the present invention provides a light emitting device system comprising power supply terminals and a remote control signal receiver, the power supply terminals being adapted for receiving electrical power from an driver, the remote control signal receiver being adapted for receiving a remote control signal, wherein the power supply terminals being adapted for receiving electrical power from an external driver and the light emitting device system is further adapted for providing the received remote control signal as remote control signal information exclusively via the power supply terminals and/or via wireless transmission to the driver.
  • a remote control of LED systems requires that the LED driver and the LED lamp are provided as one physical unit together with a remote control sensor which, by special internal wiring, allows to provide detected remote control signals directly to the driver such that in turn the driver is able to appropriately adjust the characteristics of the power supplied to the LED lamp. As a consequence, such a system lacks the ability to provide the LED lamp independently of the external driver.
  • a remote control of LED systems requires the use of an extra receiver that has to be put somewhere on or next to the luminaire and is connected to the driver by means of additional wires.
  • a system lacks the ability to provide the remote control functionality by simply retrofitting an existing luminaire with a new LED lamp and a driver, as changes to the wiring or even drilling holes into the luminaire to run the wires trough the luminaire are required.
  • a remote control receiver is provided together with the light emitting device system, and the remote control signals received by said receiver are forwarded as remote control signal information via the power supply terminals and/or via wireless transmission to the driver. Since the power supply terminals themselves and/or a wireless transmission is used for communication of information to the driver, no additional wiring in the luminaire is required.
  • a first advantage is that the light emitting device system is compatible even with 'low end' drivers which do not support control of the light emitting device system via remote control signals. In this case, the driver will simply ignore the information provided via the power supply terminals and/or via wireless transmission.
  • a second advantage is that due to the fact that no additional wiring in the luminaire is required, no additional technical and electrical approval of a light emitting device system and driver is necessary. Such a technical approval is typically provided by certain federal or state organizations and involves an extensive procedure of device testing, which is quite cost intensive and time consuming. By virtue of the light emitting device system according to the invention, no special technical approval is required.
  • a light emitting device system is understood as a solid state light system, comprising for example at least one OLED lamp, one LED lamp or laser lamp.
  • the remote control signal receiver is spatially located in a surface area of the light emitting device system facing in the direction of the illumination beam path of the light emitting device system.
  • the remote control signal receiver is spatially located in the illumination beam path of the light emitting device system.
  • the remote control signal receiver may be hidden in the LED lamp optics or the remote control signal receiver may be located on the LED system board facing in the direction of the illumination beam path of the light emitting device system. In the latter case, the remote control signal receiver is located behind the LED in a location opposite to the light radiating surface of the light emitting device system.
  • the LED lamp can suitably accommodate the remote control signal receiver, since usually the LED device is positioned in a place where electromagnetic waves, such as light, can leave the luminaire. Hence, remote control signals can use the same path to reach the LED lamp.
  • a respective remote control signal receiver would need to be electrically connected to the driver which could be realized either by mounting a certain remote control signal receiver inside the housing in which the driver is mounted or by placing a sensor somewhere on the surface of the driver housing.
  • the housing of the driver may shield remote control signals, especially when a metal housing is used.
  • an external sensor may disturb the design of the luminaire and, even worse, such a sensor has to be connected to the driver, requiring an additional wiring effort.
  • the sensor and the wiring may even be live parts and require safe isolation.
  • the light emitting device system further comprises an optical lens, wherein the remote control signal receiver is located on the optical axis of said lens.
  • the sensor is located on the surface of the lens, for example on the inner or outer lens surface.
  • the sensor may comprise on its backside facing away from the direction of the illumination beam path of the light emitting device system a light reflecting area such that light is reflected back towards the inside of the light emitting device system.
  • This special arrangement may be used for example in combination with a parabolic mirror located around the solid state light source and facing in the direction of the illumination beam path of the light emitting device system to provide light emission with a certain optical geometry, like for example a spot-like light emission.
  • the functionality of the electrical signal reception (antenna) and the functionality of the optical light reflection can be combined into just one component.
  • the remote control signal receiver may be located on the optical axis of said lens within the light emitting device system, i.e. not on the lens itself.
  • the lens may be a diffuser, so that due to the presence of the remote control signal receiver on the optical axis, shadowing of the light on the optical axis is provided. Nevertheless, by appropriately selecting the distance between the solid state light source, the shadowing remote control signal receiver and the diffuser, a highly homogeneous light emission over the whole diffuser can be obtained.
  • the light emitting device system is adapted for providing the received remote control signal as remote control signal information via the power supply terminals to the driver by emulating an electrical load of the light emitting device system, depending on the received remote control signal.
  • the remote control signal information of the light emitting device system is supplied only via the supply terminals, no additional signal connections like for example extra pins are required for signaling information from the light emitting device system to the driver. As a consequence, for example the risk of malfunction of the light emitting device system due to loose contacts is reduced. Further, this allows for the provision of light emitting device systems at lower cost and even miniaturized dimensions.
  • the light emitting device system is operable for light emission by sequentially receiving electrical power having a first or a second power signal characteristic
  • the light emitting device system further comprises an emulation circuit adapted for emulating the electrical load, wherein the emulation circuit is adapted to emulate the electrical load with a higher effectiveness when receiving the electrical power having the second power signal characteristic than when receiving the electrical power having the first power signal characteristic.
  • power signal characteristic is understood as any physical characteristic of the power signal itself. Such a characteristic may for example comprise: polarity, voltage, current, phasing, frequency, or waveform, or any combination thereof. For example, it is possible to supply a DC signal as the first power signal characteristic and to supply the DC signal with a superimposed AC signal as the second power signal characteristic.
  • the electrical power may be received sequentially as an alternating current in a first and second frequency range, wherein a detector circuit of the driver is adapted for capturing the remote control signal information of the light emitting device system only in the second frequency range, the first frequency range being different from the second frequency range.
  • the emulation circuit of the light emitting device system in case the electrical power is supplied to the light emitting device system by the alternating current in the first frequency range, the emulation circuit of the light emitting device system will not be active during said power provision in the first frequency range.
  • the emulation circuit is adapted for causing significant loading of the power supply terminals only in a second frequency range. This could be achieved by means of a bandpass filter-like behavior of the emulation circuit. During time intervals when this second frequency range is not excited by the driver, the circuit has nearly no effect on the power flow between the driver and the light emitting diode device system.
  • the provision of the supplied power to the light emitting device system is only performed at certain time intervals in the second frequency range and during the rest of the time in the first frequency range, such that in between the time intervals the emulation circuit of the light emitting device system will not unnecessarily consume electrical power since it does not respond to the first frequency range.
  • the driver switches the provision of the alternating current from the first to the second frequency range and in turn the driver will capture remote control signal information of the light emitting device system.
  • the emulation circuit of the light emitting device system becomes 'active' i.e. resonant and influences the power flow, e.g. by consuming some energy.
  • the emulation circuit of the light emitting device system can be passively turned on and off.
  • a further advantage of the usage of different frequency ranges is that a more intelligent light emitting device system may detect, by means of sensing in the relevant frequency range, whether it is powered from a driver which supports the novel signaling method by capturing remote control signal information of the light emitting device system in a certain frequency range.
  • the remote control signal receiver in the light emitting device system may detect the actual power supply characteristics and activate or deactivate the emulation accordingly.
  • the electrical load of the light emitting device system is emulated with respect to an external potential, wherein said external potential is different from the potential of the power supply terminals.
  • the potential may be ground potential.
  • the coupling to any other component which is not at ground potential could be modulated depending on the received remote control signal.
  • an external reflector of the light emitting device system may be the reference potential, wherein this reflector is electrically coupled to the external driver.
  • the driver it is possible for the driver to make use of common mode effects to detect sensed information.
  • the 'parasitic' capacity of the light emitting device system with respect to the external potential is utilized.
  • Such an embodiment could also comprise a light emitting diode unit with two power supply terminals and a metal housing for cooling.
  • the remote control signal receiver in the light emitting diode unit is adapted to influence the coupling between the power supply terminals and the metal housing.
  • the invention in another aspect, relates to a driver for an external light emitting device system comprising power supply terminals and a detector circuit, the power supply terminals being adapted for supplying electrical power from the driver to the light emitting device system and the detector circuit being adapted for capturing remote control signal information of the light emitting device system exclusively via the supply terminals and/or via wireless reception and for determining a remote control signal received by a light emitting device system using the remote control signal information, wherein the driver is further adapted to control the supplied power depending on the determined remote control signal.
  • the detector circuit is adapted for capturing the remote control signal information of the light emitting device system exclusively via the supply terminals by sensing an electrical load of the terminals caused by the light emitting device system.
  • the light emitting device system comprises at least one remote control signal receiver which can detect a certain remote control signal provided to the light emitting device system. This remote control signal is encoded as remote control signal information in a certain impedance which is emulated by the light emitting device system to the driver.
  • the remote control signal information is comprised in a sequence of impedances emulated by the light emitting device system and captured by the detector circuit by the sensing of the electrical load of the terminals caused by the light emitting device system.
  • the remote control signal information can be provided by means of the sequence of impedances emulated by a light emitting device system.
  • the impedance of the light emitting device system is modulated by the remote control signal information.
  • this can be performed by any impedance modulation, which does not necessarily have to be performed by means of a sequence of impedances.
  • the remote control signal information in the impedance emulated by the light emitting device system has the advantage of a rather simple and cost effective technical implementation.
  • a simple resistor could be used which is turned on and off for modulating the electrical load of the light emitting device system.
  • the resistor may be a tunable resistor, wherein the light emitting device system performs a time-dependent tuning and/or turning on and off of the resistor in order to provide an electrical load to the driver in a dynamic way.
  • an advantage of the emulation of the impedance is that such emulation can be designed so as to have no significant influence on the power path of the light emitting device system.
  • electrical power having a first and second power signal characteristic is supplied sequentially to the light emitting device system, wherein the detector circuit is adapted for capturing the remote control signal information of the light emitting device system only during provision of the electrical power having the second power signal characteristic, the first power signal characteristic being different from the second power signal characteristic.
  • the driver is adapted for switching between a first and second operation mode, wherein in the first operation mode the driver is adapted to supply power to the light emitting device system by the alternating current in the first frequency range and the detector circuit is disabled, and wherein in the second operation mode the driver is adapted to supply power to the light emitting device system by an alternating current in the second frequency range and the detector is enabled for capturing the remote control signal information of the light emitting device system.
  • this allows for a further reduction of the driver's power consumption, since the driver only actively captures the remote control signal information of the light emitting device system in case the alternating current is provided to the light emitting device system in the second frequency range.
  • any of the user frequencies including the first and second frequency ranges are so high that the user of the light emitting device system will not be able to see a distortion, e.g. optical flicker during operation in a frequency range or during transition between the different frequency ranges in which the electrical power is supplied to the light emitting device system and which cause a light emitting diode to be turned on and off in accordance with the actual current direction.
  • a distortion e.g. optical flicker during operation in a frequency range or during transition between the different frequency ranges in which the electrical power is supplied to the light emitting device system and which cause a light emitting diode to be turned on and off in accordance with the actual current direction.
  • the detector circuit is adapted for capturing the remote control signal information of the light emitting device system by demodulating the impedance emulated by the light emitting device system.
  • the driver is further adapted to provide the remote control signal information to an external control system and to receive a control command from the external control system in response to the provision of the remote control signal information.
  • the driver is adapted to control the supplied power, depending on the control command.
  • the external control system may be a superordinate control network like for example a DALI network.
  • DALI stands for Digital Addressable Lighting Interface and is a protocol set out in the technical standard IEC 62386.
  • the invention in another aspect, relates to an external control system, wherein the external control system is adapted to be connected to a first and a second driver, the external control system being further adapted for receiving first remote control signal information from the first driver and in response to said reception providing second remote control signal information to the second driver.
  • the external control system may only forward the remote control signal information to the second driver or the external control system may process the remote control signal information and provide different remote control signal information to the second driver.
  • Fig. 1 is a block diagram illustrating a driver 100 and a light emitting device system 112.
  • the driver comprises a power supply 102 and power supply terminals 108.
  • the light emitting device system comprises power supply terminals 114, wherein the power supply terminals 108 of the driver 100 and the power supply terminals 114 of the light emitting device system 112 are connected by means of a cable 110.
  • a cable other means could be used for the connection 110, e.g. a lighting rail system.
  • the light emitting device system comprises a solid state light source, which may for example be a conventional light emitting diode (LED) or for example an organic light emitting diode (OLED).
  • a solid state light source which may for example be a conventional light emitting diode (LED) or for example an organic light emitting diode (OLED).
  • the driver 100 supplies electrical power via the power supply terminals 108, the cable 110 and the power supply terminals 114 to a light emitting diode 116.
  • the light emitting device system 112 further comprises a remote control signal receiver 118 which may be for example an infrared signal receiver or a radio frequency signal receiver.
  • a remote control signal receiver 118 receives a remote control signal from a remote control signal transmitter not shown in Fig. 1 , e.g. a signal indicating a desired light emission characteristic like for example a certain light intensity, the receiver 118 will report this signal to an emulation module 120.
  • the emulation module 120 comprises a controller 122 and a circuit 124.
  • the controller 122 is an active controller comprising for example a processor.
  • the controller 122 may receive the remote control signal from the receiver 118 and recognize a desired adjustment of the light emission intensity by a user.
  • the controller 122 is further adapted for modulation of the impedance of the light emitting device system 112 via the circuit 124.
  • the modulation of the impedance can be performed prior and/or during operation of the light emitting device system 112 to communicate data to the driver 100.
  • the circuit 124 comprises a controllable resistor, e.g. a MOSFET, wherein the resistance is modulated in accordance with the information to be provided to the driver 100, i.e. the remote control signal information.
  • the controller 122 detects a desired change of the light emission intensity, and the controller 122 tunes the circuit 124 for a respective impedance variation in order to communicate the desired change of the light emission intensity as remote control signal information to the driver.
  • the driver 100 While providing electrical power to the light emitting device system 112, the driver 100 detects the impedance variation of the light emitting device system 112 via the supply terminals 108, the cable 110 and the supply terminals 114. The detection of the impedance variation is performed by means of a detector 106 of the driver 100. In other words, the detector 106 captures the remote control signal information 'change of light emission intensity' by sensing a respectively assigned variation of the electrical load of the light emitting device system 112. In response, a controller 104 of the driver 100 controls the power supplied by means of the power supply 102, depending on the received remote control signal information. For example, the controller 104 may control the power supply 102 to reduce the electrical power supplied to the light emitting device system 112, which will lead to a certain light intensity attenuation of the light emitted by the LED 116 of the LED system 112.
  • a network 126 which can be for example a superordinate control network. If the network is present, the remote control signal information detected by the driver 100 may also be forwarded to the network 106. If several luminaires are employed comprising different drivers and LED systems with this feature, a distributed remote control receiver can be built. In such a case, the driver may change the signal by including additional information into the forwarded remote control signal information, which allows the control network to determine the driver and hence the location where the signal was received from.
  • a data processing system like a personal computer (PC) 128 may be part of the network and can be used in real time to display the actually set light emission characteristics of the LED system 112.
  • the receiver 118 of the LED system 112 detects a remote control signal that indicates a desired change of the light emission characteristics of the LED 116, this information is provided to the PC 128 via the driver 100 and the network 126.
  • the driver may automatically set the desired light emission characteristics of the LED by appropriately adjusting the power supplied via the terminals 108 and 114 to the LED system 112, or the PC 128 may adjust the power supply characteristics of the driver 100.
  • the PC 128 is always able to provide information about the actual light emission characteristics of the LED system 112.
  • the LED system 112 with one or more sensors which may sense the actual operating condition of the LED system 112.
  • Such an operating condition may comprise, without loss of generality, an actual light emission characteristic of the light emitting device system and/or a temperature of the light emitting device system and/or an environmental condition of the environment in which a light emitting device system is being operated and/or a time of operation of the light emitting device system.
  • various kinds of sensors may be used in the light emitting device system 112. These sensors may include for example temperature sensors, sensors which can sense the environmental conditions of the environment in which the light emitting device system is operated, for example a light sensor, humidity sensor, dust sensor, fog sensor or a proximity sensor.
  • the LED system 112 may transmit the remote control signal information via radio frequency (RF) transmission to the driver 100.
  • RF radio frequency
  • optical transmission of information or ultrasonic data transmission is possible, wherein in the latter case preferably the driver 100 and the LED system 112 comprise a common housing through which an ultrasonic coupling is provided.
  • the receiver 118 may receive an RF remote control signal in a first frequency range and provide respective remote control signal information in a second RF frequency range to the driver 100.
  • Fig. 2 is a schematic view of a circuit diagram of the driver 100 and the light emitting device system 112.
  • the driver 100 comprises a current source 102.
  • the light emitting device system 112 comprises a set of light emitting diodes 116 in serial connection with each other. These series-connected diodes form an LED string.
  • the current source 102 and the light emitting diodes 116 are connected via power supply terminals 108 and 114 by means of wires 110 which may also include connectors and respective sockets.
  • the light emitting device system 112 further comprises a circuit 208 which comprises a resistor 204 and a transistor 206.
  • the resistor 204 and the transistor 206 are arranged in series with respect to each other.
  • the circuit 208 is arranged in parallel with the light emitting diode string comprising the LEDs 116.
  • the light emitting device system further comprises a receiver 118 which comprises an infrared sensitive diode 202 and an amplifier 200.
  • a remote control signal which may be an infrared light in a certain optical wavelength range
  • the photodiode 202 generates a photocurrent which is amplified by means of the amplifier 200.
  • This amplified signal is provided to the transistor 206 of the circuit 208.
  • an electrical current can flow from the top power supply terminal 114 of the light emitting device system to the lower power supply terminal 114 of the light emitting device system, thus changing the impedance of the system 112.
  • This impedance change can be detected by the detector 106 of the driver 100.
  • the detector 106 may use this remote control signal information received via the change of the measured impedance and instruct the power source 102 to adjust the power output characteristics.
  • the controller 104 of Fig. 1 may be included in the detector 106 or vice versa.
  • the remote control signal received at the receiver 118 may be translated from one coding scheme into a different format which is better suited for the further handling of the information.
  • a receiver unit 210 which comprises the receiver 118 and a circuit 208
  • the translation in the detector 106 e.g. it is possible to translate a received RC5 code into a I2C message.
  • Fig. 3 is a further schematic view of a circuit diagram of a driver 100 and the light emitting device system 112.
  • the driver comprises a current source 102 and a detector 106, as well as the power terminals 108.
  • the light emitting device system 112 comprises diodes 106 which form an LED string, as already discussed with respect to Fig. 2 .
  • the current source 102 and the light emitting diode 116 are connected via the power supply terminals 108 and 114 by means of wires 110.
  • the light emitting device system 112 further comprises a circuit 308.
  • the circuit 308 comprises an impedance 302, a capacitance 304 and a variable resistor 306, which are arranged in series with respect to each other.
  • the circuit 308 is arranged in parallel with the light emitting diode string.
  • the circuit 308 acts as frequency selection circuitry whose impedance can be tuned by means of the variable resistor 306.
  • the circuit 308 may be any circuit which is adapted to emulate a predefined impedance when receiving electrical power with the predefined power signal characteristic, which may for example comprise a certain frequency range as will be further described, without loss of generality, in this example.
  • the circuitry 308 will not influence the power delivered to the light emitting diode string comprising the diodes 116.
  • the impedance of the circuitry 308 can be detected.
  • the power supply 102 can be switched from DC operation to AC operation via the detector 106, which comprises a respective controller, not shown here.
  • the detector 106 which comprises a respective controller, not shown here.
  • a certain current will flow through the circuitry 308, since the circuitry 308 becomes resonant.
  • the impedance 'emulated' by the light emitting device system 112 using the circuitry 308 can be detected.
  • the effect of the light emitting diodes may be compensated in the control circuitry of the driver 100.
  • a further solution would be to deactivate the current source and only use a small sensing voltage, which does not reach the forward voltage of the light emitting diode string but is sufficient to sense the electrical load due to the presence of the circuit 308. In such a case, short sensing intervals are preferred to avoid visible artifacts in the light output of the light emitting diode string. Further, such an embodiment is preferred when the light emitting diode system is in the 'off state' and waiting to receive a certain remote control signal, causing it to be powered up to the on state.
  • FIG. 2 A difference between the embodiments of Figs. 2 and 3 is that in Fig. 2 an IR photodiode 202 is used for detecting a remote control signal, whereas in the embodiment of Fig. 3 an RF antenna 300 is used to receive a respective RF remote control signal.
  • the remote control signal has a detectable impact when measuring the load between the power terminals of the load, in case information transmission exclusively via the connection terminals 108 and 114 is used.
  • this detectable impact is effective for the current passing through both power supply terminals at the same time, but of opposite polarity, and can be referred to as a differential mode effect.
  • the driver it is also possible for the driver to make use of common mode effects to detect remote control signal information.
  • the parasitic capacity of the light emitting diode unit with respect to ground potential is utilized.
  • Such an embodiment could comprise a light emitting diode unit with two power supply terminals and a metal housing for cooling.
  • the receiver in the light emitting diode unit is adapted to influence the coupling between the power supply terminals and the metal housing.
  • the driver will superimpose a certain signal on the power supply terminal, preferably at a high frequency or at a high frequency alternating voltage.
  • the coupling capacity from the power supply terminal to ground will be higher than in the case that a sensor has disconnected the housing.
  • the driver can detect if there is a better or worse coupling from the light emitting diode unit towards ground potential.
  • This measurement allows detecting whether a switch which either connects the housing to or disconnects the housing from one of the power supply terminals is opened or closed and hence provides information about the remote control signal information provided by the light emitting diode unit.
  • the power supply terminal is coupled to the metal housing or to other metal parts instead of the metal housing, e.g. an internal metal heat sink inside a light emitting diode system which is encased in a plastic housing, or to other electrically conductive parts like for example a conductive screening layer on the inner side of a plastic housing or an extended copper area on a printed circuit board.
  • the metal housing e.g. an internal metal heat sink inside a light emitting diode system which is encased in a plastic housing, or to other electrically conductive parts like for example a conductive screening layer on the inner side of a plastic housing or an extended copper area on a printed circuit board.
  • the impedance emulating circuitry may be realized differently, e.g. consisting of a capacitor and a resistor, connected across a portion of the light emitting diode string, and being connected in series with the light emitting diodes and consisting of a simple inductor in case of DC driving of the light emitting diodes or a parallel connection of an inductor and/or a resistor and/or a capacitor.
  • the frequency ranges preferably should be selected appropriately to decouple the 'information portion' from the 'power supply portion' of the load caused by the light emitting diode unit. According to the current stress to the component determining the volume, causes and losses, parallel structures as in Figs. 2 and 3 are preferred.
  • Fig. 4 is a flowchart illustrating a method of operating a light emitting diode arrangement consisting of a light emitting device system and a driver.
  • the method starts with step 400 in which the light emitting device system is operated according to a first set of power supply characteristics, being, in the example of Fig. 4 , a first frequency.
  • the driver provides electrical power to the light emitting device system by means of an alternating current of the first frequency.
  • the driver switches for operation at a second set of power supply characteristics, being, in the example of Fig. 4 , a second frequency which is different from the first frequency.
  • the light emitting device system comprises an electric circuit which acts as an electrical load with a higher effectiveness when the light emitting device system operates according to the second set of power supply characteristics (404), being, in the example of Fig. 4 , the second frequency.
  • the circuitry may comprise a switch which can be turned on and off, depending on certain remote control signal information to be provided by the light emitting device system to the driver.
  • step 406 the driver senses the electrical load of the light emitting device system by detecting the impedance of the light emitting device system.
  • step 408 the driver adapts the power characteristics of the electrical power supply to the light emitting device system.
  • the method continues with step 400 by switching to the operation mode in which the first set of power supply characteristics, e.g. the first frequency, is used.
  • each light emitting device system comprises a housing 500 which comprises a system board 506. Mounted on the system board 506 are at least one light emitting diode 116 and an emulation module 120. Further, the LED system 112 comprises an optical lens 502 which may be used to concentrate the light emanated from the light emitting diode(s) or to expand the light beam emanated from the light emitting diode(s) 116.
  • a remote control signal receiver 118 is located in a surface area of the light emitting device system facing in a direction 510 of the illumination beam path of a light cone 508.
  • a different orientation of the sensor E.g. a sensor with omnidirectional sensitivity can be placed on a surface having any orientation, as long as a direct or reflected line-of-sight between the desired remote control transmitter position and the sensor is possible.
  • the remote control signal receiver is mounted on the system board 506 and located between two light emitting diodes 116. As a consequence, the remote control signal receiver is not located in the illumination beam path 510 facing in the direction of the illumination beam path 510. As a consequence, especially in case the receiver 118 is an optical receiver, such as an infrared remote control signal receiver, any IR remote control signal pointing within the light cone 508 towards the light emitting device system 112 will be sensed by the receiver 118. In a more illustrative manner, any object which is illuminated directly by the light emitting device system 112 may be used as transmitter position for a remote control transmitter since, in this case, the remote control transmitter and the receiver 118 are in the direct line of sight.
  • the remote control signal receiver 118 is located in the illumination beam path 510 of the light emitting device system. More precisely, the remote control signal receiver 118 is located on an optical axis 512 of the lens 502. On its rear side facing the LED 116, the remote control signal receiver 118 carries a mirror 514. Light which directly emanates from the LED 116 towards the mirror 514 on the optical axis 512 is reflected towards a parabolic mirror 504 which is arranged on the system board 506 around the LED 116. Since the mirror 504 is a concave mirror, the LED system 112 in combination with the lens 502 can be used for providing a directed and highly parallel beam in the direction 510. At the same time, the remote control signal receiver 118 is always visible for an infrared remote control transmitter, since no shadowing of the receiver 118 by other parts of the LED system 112 takes placet.
  • the remote control signal receiver 118 is located in the surface area of the LED system which faces in the direction 510 of the illumination beam path of the light emitting device system.
  • the remote control signal receiver is mounted to the housing 500, which has similar advantages to the receiver position discussed with respect to Fig. 5b .

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Claims (15)

  1. Lichtemittierendes Vorrichtungssystem (112), das Stromversorgungsanschlüsse (114) und einen Fernbedienungssignalempfänger (118) umfasst, wobei die Stromversorgungsanschlüsse (114) angepasst sind, elektrischen Strom von einem Treiber (100) zu empfangen, wobei der Fernbedienungssignalempfänger (118) angepasst ist, ein Fernbedienungssignal zu empfangen,
    dadurch gekennzeichnet
    - dass die Stromversorgungsanschlüsse angepasst sind, elektrischen Strom von einem externen Treiber (100) zu empfangen, und
    - dass das lichtemittierende Vorrichtungssystem (112) ferner angepasst ist, das empfangene Fernbedienungssignal als Fernbedienungssignalinformationen zum externen Treiber (100) ausschließlich via die Stromversorgungsanschlüsse (114) und/oder via drahtlose Übertragung weiterzuleiten.
  2. Lichtemittierendes Vorrichtungssystem (112) nach Anspruch 1, wobei der Fernbedienungssignalempfänger (118) in die Richtung (510) des Beleuchtungsstrahlpfades des lichtemittierenden Vorrichtungssystems (112) weist.
  3. Lichtemittierendes Vorrichtungssystem (112) nach Anspruch 2, wobei der Fernbedienungssignalempfänger (118) räumlich im Beleuchtungsstrahlpfad des lichtemittierenden Vorrichtungssystems (112) positioniert ist.
  4. Lichtemittierendes Vorrichtungssystem (112) nach Anspruch 3, wobei das lichtemittierende Vorrichtungssystem (112) ferner eine optische Linse (502) umfasst, wobei der Fernbedienungssignalempfänger (118) auf der optischen Achse (512) der Linse positioniert ist.
  5. System nach Anspruch 1, wobei das lichtemittierende Vorrichtungssystem (112) angepasst ist, durch Emulieren einer elektrischen Last des lichtemittierenden Vorrichtungssystems (112) in Abhängigkeit vom empfangenen Fernbedienungssignal dem Treiber (100) das empfangene Fernbedienungssignal als Fernbedienungssignalinformationen via die Stromversorgungsanschlüsse bereitzustellen.
  6. Lichtemittierendes Vorrichtungssystem (112) nach Anspruch 5, wobei das lichtemittierende Vorrichtungssystem (112) für eine Lichtemission durch sequenzielles Empfangen von elektrischem Strom, der eine erste wurde eine zweite Stromsignalcharakteristik aufweist, betreibbar ist, wobei das lichtemittierende Vorrichtungssystem (112) ferner eine Emulationsschaltung (124) umfasst, die zum Emulieren der elektrischen Last angepasst ist, wobei die Emulationsschaltung angepasst ist, die elektrische Last mit einer höheren Effektivität zu emulieren, wenn sie den elektrischen Strom empfängt, der die zweite Stromsignalcharakteristik aufweist, als wenn sie den elektrischen Strom empfängt, der die erste Stromsignalcharakteristik aufweist.
  7. Lichtemittierendes Vorrichtungssystem (112) nach Anspruch 5, wobei die Emulationsschaltung angepasst ist, die elektrische Last des lichtemittierenden Vorrichtungssystems (112) mit Bezug auf ein externes Potenzial zu emulieren, wobei sich das externe Potenzial vom Potenzial der Stromversorgungsanschlüsse (114) unterscheidet.
  8. Treiber (100) für ein externes lichtemittierendes Vorrichtungssystem (112), das Stromversorgungsanschlüsse (108) und eine Detektorschaltung (106) umfasst, wobei die Stromversorgungsanschlüsse angepasst sind, elektrischen Strom vom Treiber (100) zum lichtemittierenden Vorrichtungssystem (112) zu lieferen, dadurch gekennzeichnet, dass die Detektorschaltung (106) angepasst ist, Fernbedienungssignalinformationen vom lichtemittierenden Vorrichtungssystem (112) zu empfangen, wobei der Treiber (100) ferner angepasst ist, den gelieferten Strom in Abhängigkeit von den empfangenen Fernbedienungssignalinformationen zu steuern, wobei die Detektorschaltung (106) angepasst ist, Fernbedienungssignalinformationen vom lichtemittierenden Vorrichtungssystem (112) ausschließlich via die Versorgungsanschlüsse und/oder via drahtlosen Empfang zu empfangen sowie unter Verwendung der Fernbedienungssignalinformationen ein Fernbedienungssignal, das vom lichtemittierenden Vorrichtungssystem (112) empfangen wird, zu bestimmen.
  9. Treiber (100) nach Anspruch 8, wobei die Detektorschaltung (106) angepasst ist, die Fernbedienungssignalinformationen des lichtemittierenden Vorrichtungssystems (112) via die Versorgungsanschlüsse durch Erkennen einer elektrischen Last der Anschlüsse, die vom lichtemittierenden Vorrichtungssystem (112) verursacht wird, zu erfassen.
  10. Treiber (100) nach Anspruch 8, wobei die Fernbedienungssignalinformationen in einer Impedanz enthalten sind, die vom lichtemittierenden Vorrichtungssystem (112) emuliert und von der Detektorschaltung (106) durch Erkennen der elektrischen Last der Anschlüsse, die vom lichtemittierenden Vorrichtungssystem (112) verursacht wird, erfasst wird.
  11. Treiber (100) nach Anspruch 10, wobei die Fernbedienungssignalinformationen in einer Sequenz von Impedanzen enthalten sind, die vom lichtemittierenden Vorrichtungssystem (112) emuliert und von der Detektorschaltung (106) durch Erkennen der elektrischen Last der Anschlüsse, die vom lichtemittierenden Vorrichtungssystem (112) verursacht wird, erfasst werden.
  12. Treiber (100) nach Anspruch 11, wobei die Fernbedienungssignalinformationen als digitale Informationen in der Sequenz von Impedanzen enthalten sind, die vom lichtemittierenden Vorrichtungssystem (112) emuliert werden.
  13. Treiber (100) nach Anspruch 8, wobei der elektrische Strom, der eine erste und eine zweite Stromsignalcharakteristik aufweist, sequenziell zum lichtemittierenden Vorrichtungssystem (112) geliefert wird, wobei die Detektorschaltung (106) angepasst ist, die Fernbedienungssignalinformationen des lichtemittierenden Vorrichtungssystems (112) nur während der Bereitstellung des elektrischen Stroms, der die zweite Stromsignalcharakteristik aufweist, zu erfassen, wobei sich die erste Stromsignalcharakteristik von der zweiten Stromsignalcharakteristik unterscheidet.
  14. Treiber (100) nach Anspruch 13, wobei der Treiber angepasst ist, zwischen einem ersten und einem zweiten Betriebsmodus umzuschalten, wobei im ersten Betriebsmodus der Treiber (100) angepasst ist, Strom zum lichtemittierenden Vorrichtungssystem (112) zu liefern, der die erste Stromsignalcharakteristik aufweist, und die Detektorschaltung (106) deaktiviert ist und wobei im zweiten Betriebsmodus der Treiber (100) angepasst ist, Strom zum lichtemittierenden Vorrichtungssystem (112) zu liefern, der die zweite Stromsignalcharakteristik aufweist, und die Detektorschaltung (106) aktiviert ist, um die Fernbedienungssignalinformationen des lichtemittierenden Vorrichtungssystems (112) zu erfassen.
  15. System, das ein externes Steuersystem und einen ersten und einen zweiten Treiber nach Anspruch 8 umfasst, wobei
    das externe Steuersystem angepasst ist, mit dem ersten und dem zweiten Treiber (100) verbunden zu sein, wobei das externe Steuersystem ferner angepasst ist, erste Fernbedienungssignalinformationen vom ersten Treiber (100) zu empfangen und in Reaktion auf den Empfang dem zweiten Treiber (100) zweite Fernbedienungssignalinformationen bereitzustellen.
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PCT/IB2010/051095 WO2010109366A1 (en) 2009-03-24 2010-03-15 Light emitting device system comprising a remote control signal receiver and driver
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JP2015146323A (ja) 2015-08-13
KR20110136869A (ko) 2011-12-21
CN102362554B (zh) 2014-11-12
WO2010109366A1 (en) 2010-09-30
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KR101700443B1 (ko) 2017-02-21
US20120091902A1 (en) 2012-04-19
US9591725B2 (en) 2017-03-07
BRPI1006206A2 (de) 2017-07-25
CA2756241A1 (en) 2010-09-30
ES2666552T3 (es) 2018-05-07
JP2012521706A (ja) 2012-09-13
RU2011142770A (ru) 2013-04-27
JP5719342B2 (ja) 2015-05-20

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